This SAE Standard documents dimensional metric specifications
for hydraulic brake system tubing with flared ends, threaded ports,
and male tube nuts for the interconnection of major components in
automotive hydraulic brake systems.

The purpose of this document is to recommend preferred
metrically dimensioned components (including alternative choices),
that are intended to be functionally compatible with International
Organization for Standardization Specification, ISO 4038. Some
applications may require sizes of forms other than those shown
herein, and this document does not preclude such other details when
they are required.